prod : DiscordNotifier 를 통한 에러 실시간 알림 및 부분 포맷 변경#237
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…dler for better readability
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Summary of Changes
Hello @polyglot-k, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!
I've refactored the global exception handling logic to improve code organization and enhance the clarity of Discord exception notifications. The primary goal was to streamline how exceptions are processed and communicated, ensuring that critical alerts are more informative and easier to understand. This change focuses on internal code structure and external notification presentation.
Highlights
- Exception Handling Refactor: Relocated the notifyIfNeeded method within GlobalExceptionHandler for better code structure and simplified the @ExceptionHandler annotation for AuthenticationException by removing the fully qualified class name.
- Discord Notification Update: Modified the Discord exception notification message, changing the prefix from "❌ 알림 전송 실패" to "
⚠️ 알림 전송" and refining its overall formatting for improved clarity.
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Code Review
This pull request refactors exception handling and notification logic. My review focuses on a critical issue with ambiguous exception handlers that could prevent the application from starting, a high-severity issue with potential NullPointerExceptions in the notification logic, and a medium-severity suggestion to improve string formatting for better performance and readability. The changes to the notification message text and code organization are reasonable.
| @ExceptionHandler(AuthenticationException.class) | ||
| public ResponseEntity<ErrorResponse> handleCustomAuthenticationException( | ||
| life.mosu.mosuserver.global.exception.AuthenticationException ex) { | ||
| AuthenticationException ex) { |
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This change introduces an ambiguity in exception handling. Both this method (handleCustomAuthenticationException) and handleAuthenticationException (line 72) now handle AuthenticationException.class.
Due to the import import org.springframework.security.core.AuthenticationException; on line 14, AuthenticationException.class resolves to org.springframework.security.core.AuthenticationException.class. This results in two handlers for the same exception, which will cause an IllegalStateException at runtime and prevent the application from starting.
To fix this, you should revert to using the fully qualified class name for your custom AuthenticationException to distinguish it from Spring's AuthenticationException.
| @ExceptionHandler(AuthenticationException.class) | |
| public ResponseEntity<ErrorResponse> handleCustomAuthenticationException( | |
| life.mosu.mosuserver.global.exception.AuthenticationException ex) { | |
| AuthenticationException ex) { | |
| @ExceptionHandler(life.mosu.mosuserver.global.exception.AuthenticationException.class) | |
| public ResponseEntity<ErrorResponse> handleCustomAuthenticationException( | |
| life.mosu.mosuserver.global.exception.AuthenticationException ex) { |
| DiscordExceptionNotifyEventRequest request = DiscordExceptionNotifyEventRequest.of( | ||
| ex.getCause().toString(), | ||
| ex.getMessage() | ||
| ); |
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The call ex.getCause().toString() on line 155 will throw a NullPointerException if ex.getCause() returns null. Many exceptions are thrown without a cause, which would make this notification logic fail silently (the NPE would be caught and logged, but the original exception notification would not be sent).
To make the notification more robust, you should handle the case where the cause is null.
| DiscordExceptionNotifyEventRequest request = DiscordExceptionNotifyEventRequest.of( | |
| ex.getCause().toString(), | |
| ex.getMessage() | |
| ); | |
| DiscordExceptionNotifyEventRequest request = DiscordExceptionNotifyEventRequest.of( | |
| ex.getCause() != null ? ex.getCause().toString() : "N/A", | |
| ex.getMessage() | |
| ); |
| return "⚠️ **알림 전송**\n" | ||
| + String.format("- ⚠️ exception Cause : `%s`\n", exceptionCause) | ||
| + String.format("- 📨 exception Message: `%s`\n", exceptionMessage) | ||
| + String.format("- 📋 meta: `%s`", meta == null ? "없음" : meta); |
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Using the + operator for string concatenation can be inefficient as it creates multiple intermediate String objects. For better performance and readability, you can use a single String.format() for the entire message template.
If you are using Java 15+, you could also consider using a text block with the .formatted() method for even better readability.
| return "⚠️ **알림 전송**\n" | |
| + String.format("- ⚠️ exception Cause : `%s`\n", exceptionCause) | |
| + String.format("- 📨 exception Message: `%s`\n", exceptionMessage) | |
| + String.format("- 📋 meta: `%s`", meta == null ? "없음" : meta); | |
| return String.format("⚠️ **알림 전송**\n- ⚠️ exception Cause : `%s`\n- 📨 exception Message: `%s`\n- 📋 meta: `%s`", | |
| exceptionCause, | |
| exceptionMessage, | |
| meta == null ? "없음" : meta); |
1 participant
This pull request refactors exception handling and notification logic in the global exception handler, and updates the formatting of Discord exception notification messages. The main changes include moving the
notifyIfNeededmethod, simplifying exception handler annotations, and revising the notification message content.Exception handling refactor:
notifyIfNeededmethod from the top of theGlobalExceptionHandlerclass to the bottom, improving code organization. [1] [2]@ExceptionHandlerannotation forAuthenticationExceptionby removing the fully qualified class name, making the code cleaner and easier to read.Notification message update: